71443711 has 4 divisors (see below), whose sum is σ = 71618800. Its totient is φ = 71268624.

The previous prime is 71443699. The next prime is 71443717. The reversal of 71443711 is 11734417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11734417 = 173 ⋅67829.

It is a cyclic number.

It is not a de Polignac number, because 71443711 - 2⁷ = 71443583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71443711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71443717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86931 + ... + 87748.

It is an arithmetic number, because the mean of its divisors is an integer number (17904700).

Almost surely, 2^71443711 is an apocalyptic number.

71443711 is a deficient number, since it is larger than the sum of its proper divisors (175089).

71443711 is a wasteful number, since it uses less digits than its factorization.

71443711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175088.

The product of its digits is 2352, while the sum is 28.

The square root of 71443711 is about 8452.4381689546. The cubic root of 71443711 is about 414.9425787878.

The spelling of 71443711 in words is "seventy-one million, four hundred forty-three thousand, seven hundred eleven".